British Airways passengers stranded after IT failures
British Airways says it has fixed the IT glitch which caused more than 100 flights to be cancelled and more than 200 others to be delayed.
The airline said flights were returning to normal but warned that there may be “knock-on operational disruption”.
At least 117 flights had been cancelled at Heathrow Airport, with 10 cancelled at Gatwick Airport.
The problem had caused BA to revert to using manual systems for check-in at airports, causing long queues.
It has apologised for the disruption and said customers on short-haul services from Heathrow, Gatwick and London City can rebook another day.
“We continue to advise customers to check ba.com for the latest flight information before coming to the airport, and to leave additional time,” it said.
The airline said the issue had not been a global problem, and involved two separate systems – one which deals with online check in, the other that deals with flight departures.
The issues were affecting flights across its network but not at every airport, it added.
Passengers have been invited to rebook flights on any other day up to next Tuesday.
Travellers have been expressing their frustration on social media.
Alex Brayson and his partner faced delays from Newcastle Airport en route to their wedding near Lake Bled in Slovenia on Saturday.
Despite boarding their first flight shortly before 06:00 BST, Mr Brayson said they missed their connecting flight to Venice, and their onward transfer was running three hours behind.
“We’ve got 25 of us flying to the wedding so we are growing anxious,” he told BBC Newcastle.
“Me and my partner booked the trip so we’ve had to organise everything again.”
Junior Great Britain wheelchair tennis player Abbie Breakwell, 16, is stuck in Heathrow with her mum after their flight and its replacement were both cancelled.
She is meant to be playing in a tournament in Belgium on Thursday – but has to register in person the night beforehand.
“They [BA] are trying to get us another flight but it’s very hard at the moment.
“It’s just a shame. I’ve been training for quite a while for these tournaments, but we can’t go.
The teenager, from Nottingham, praised the “fantastic” airport staff for their efforts to get her to Belgium in time but added: “There’s still hope, but it’s slowly fading a bit.”
Sam Angeli is stranded in Cyprus with his wife and two children after his flight home to London on Wednesday evening was cancelled.
He has been forced to spend more than £850 on two rooms at a hotel for the night.
Mr Angeli said his experience of BA had been an “absolute shambles”.
“They’ve not emailed us, phoned us or messaged us about the delay,” he said.
“We’re just supposed to know what to do. I’m really angry with them.”
Meanwhile, musicians heading to a four-day indie festival being staged on a boat are in a race against time to make it to Barcelona before it sets sail.
Belle and Sebastian singer Stuart Murdoch said he and 30 others – including Glaswegian outfit Camera Obscura – had planned to fly from Heathrow but were now trying to make a replacement flight at Gatwick.